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Possible microphthalmia in a young racing homer.
Possible microphthalmia in a young racing homer.
Locus mi locus
Genetic symbol mi
Common name Microphthalmia
Inheritance Autosomal recessive
Mutation type Morphological
Description Pigeons hatch with tiny or no eyes.

Microphthalmia is an allele at the mi locus. This mutation is recessive to wild type.


This mutation causes pigeons to hatch with very small eyes, or no eyes at all.


Microphthalmia is an autosomal recessive mutation. This means that both parents need to carry the mutant gene for it to express in the next generation. As a recessive mutation, it is possible for microphthalmia to be carried by a bird who does not visually express it.


See also